Citi Bike rider claims a horrific crash last year damaged a nerve in his brain, robbing him of his sense of taste and smell. Ronald Corwin and his wife sued the city and Citi Bike’s private operator Thursday for $15 million over the Midtown accident.“This has turned my life inside out,” Corwin, 73, said. “I do nothing now but go from one (medical) specialist to another trying to find some relief.”